Forming of Positive Macrosegregations during Steel Ingot Solidification.

• Radovié Zarko

  Faculty of Metallurgy and Technology, University of Montenegro

• Lalovié Milisav

  Faculty of Metallurgy and Technology, University of Montenegro

• Tripkovié Milivoje

  Faculty of Metallurgy and Technology, University of Montenegro

• Jakié Branislav

  Faculty of Metallurgy and Technology, University of Montenegro

Abstract

It is known that the degree of positive segregations in upper part of ingots is very sensitively dependent upon the enriched liquid velocity. In this paper, relationship between chemical composition of steel and liquid density changes are considered.Besides, the influence of the primary and secondary arm spacing (λ₁, λ₂) on the liquid flow velocity, i.e. intensity of positive macrosegregations, was studied, using examples from 3-tone ingots, for different grades of steel. The elements as W, Ni, Mo, Cr, decreases the effect of density changes (dρ_L/df_L), i.e. they have smaller tendency to segregation forming. Global intensity of positive macrosegregations, S_i^g, which can be calculated by integration of local macrosegregations degree, depends approximately linearly on the liquid flow velocity.

Journal

• ISIJ International

  ISIJ International 39 (4), 329-334, 1999

  The Iron and Steel Institute of Japan

Keywords

• solidification
• liquid velocity
• macrosegregations
• dendrite structure

Details

• CRID: 1390282681429566464
• NII Article ID: 10002462763
• NII Book ID: AA10680712
• DOI: 10.2355/isijinternational.39.329
• COI: 1:CAS:528:DyaK1MXktVeqs7g%3D
• ISSN: 13475460
• ISSN: 09151559
• Web Site: http://www.jstage.jst.go.jp/article/isijinternational1989/39/4/39_4_329/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed